page = PAGE
page.10 = TEXT
page.10.value = HELLO WORLD
Usually this typoScript snippets are added to Web >> Template >> Info/Modify >> setup
This snippet opens a new PAGE object. Inside the PAGE object, the 10th entry is set to be a TEXT object. The value of thus TEXT object is set to HELLO WORLD. It is convention to only use the increments of 10 to define content objects in order to allow more entries to be added at a later time.